Home / 3,939.84-5,438.79-2,806.29

Finding the Fourth Proportional to 3,939.84, 5,438.79 and 2,806.29

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Solution

The fourth proportional to 3,939.84, 5,438.79 and 2,806.29 is: 3,873.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.84 : 5,438.79 = 2,806.29 : x
  2. Step 2: Convert to fraction form
    3,939.84/5,438.79 = 2,806.29/x
  3. Step 3: Cross multiply
    3,939.84x = 5,438.79 × 2,806.29
  4. Step 4: Simplify right side
    3,939.84x = 15,262,821.99
  5. Step 5: Solve for x
    x = 15,262,821.99/3,939.84
  6. Step 6: Final answer
    x = 3,873.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.